“Pocketful of Stars” is set against the background of Chinese workers employed to build the railroad. As with the Bonanza episode, “Day of the Dragon,” a certain amount of contrivance is required to get the Chinese woman played by Ms. Lu into an alliance with the series protagonist, Cheyenne Bodie (Clint Walker). But once they’re together they have a number of excellent scenes together and Ms. Lu has quite a substantial part, although not as dominant in the narrative as her character was in “Day of the Dragon.”